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Questions tagged [wchar]

wchar.h is a header file in the C standard library. It is a part of the extension to the C programming language standard done in 1995. It contains extended multibyte and wide character utilities. The standard header is included to perform input and output operations on wide streams. It can also be used to manipulate the wide strings.

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Converting string macros/constants to wide characters/Unicode

I have a Unicode Win32 application that uses 3rd party libraries, some of which provide constants for their version information as #defined (narrow) strings. For instance, libpng has the following: #define PNG_LIBPNG_VER_STRING "1.5.4" #define…
CoreyStup
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Cannot convert char* to WCHAR* [qt/c++]

im developin QT application, and i need to include pure C code. When i compile this code in code::blocks it was successful, maybe one warning, but when i try to compile it in QT creator, i get these 4 errors. cannot convert 'char*' to 'WCHAR*' for…
Anton Giertli
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Why there is a underline before wtoi in function _wtoi which ansi version is atoi?

Hello！ It is confused me for a long time! Long long ago , there is only ansi version that is atoi . And now (it is also long long ago ) there is a wide char version . But why the wide char version has a uderline('_') before wtoi? Could any one tell…
NorSD NorSD
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Is it safe to return std::wstring from a DLL?

According to some older StackOverflow questions ( Unable to pass std::wstring across DLL , C++ DLL returning pointer to std::list ) it's not considered safe for a C++ DLL to return a std::wstring because there's no guarantee the main…
cf-
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Implication of using -fshort-wchar

While going through the file wchar.h on Mac OS X system, I found that wchar_t equivalent of str functions such as wcscpy, wcscat are poisoned when __cplusplust is not defined and max size of wchar_t is of 2 bytes (by using compiler option…
doptimusprime
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C++ WCHAR manipulations

I'm developing a tiny Win32 app in C++. I've studied C++ fundamentals long time ago, so now I completely confused because of character strings in C++. There were no WCHAR or TCHAR only char and String. After a little investigation I've decided not…
Geradlus_RU
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char* to const wchar_t * conversion

I need to convert character pointer to a w_char * in order to use ParseNetworkString(). I've tried finding solutions to this myself, and while I have found one solution, there is one issue which blocks me from using it: b1naryatr0phy said in an…
user1553248
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how to define macro to convert concatenated char string to wchar_t string in C

Like _T() macro in Visual Studio, I defined and used my own _L macro as： #define _L(x) __L(x) #define __L(x) L ## x It works for: wprintf(_L("abc\n")); But gets a compilation error for: wprintf(_L("abc\n""def\n")); It reports “string literals…
RolandXu
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Different byte order from pipe using _wpopen in c

I wrote this function that opens a pipe and passes a command to that pipe to be executed, when examining the buffers I noticed that some commands take 1 byte other take 2 bytes, that being said trying to output the buffer to the screen causes some…
loaded_dypper
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C++ , winapi Compare two WCHAR * strings

I want to compare two WCHAR* strings. How to do it? P.S. I would like to ignore case while comparing. I know you can use strcmpi but it id not working for WCHAR*.
Hooch
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putwchar() can't diplay a wchar_t variable

Why printf() can display é (\u00E9 int UTF-16) and putwchar() can't ? And what is the right syntax to get putwchar displaying é correctly ? #include #include #include #include int main() { wint_t wc =…
noraj
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How to do operations with 'æ', 'ø' and 'å' in C

I have made a program in C which both can replace or remove all vowels from a string. In addition I would like it to work for these characters: 'æ', 'ø', 'å'. I have tried to use strstr(), but I didn't manage to implement it without replacing all…
Martin Johansen
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wchar_t* to char* conversion problems

I have a problem with wchar_t* to char* conversion. I'm getting a wchar_t* string from the FILE_NOTIFY_INFORMATION structure, returned by the ReadDirectoryChangesW WinAPI function, so I assume that string is correct. Assume that wchar string is "New…
Anatoly Lushnikov
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writing unicode characters/string to file

I'm trying to write unicode characters to file with std::wofstream but the put or write function doesn't write any characters. Sample code: #include #include int main() { std::wofstream file; file.open("output.txt",…
user11157650
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C - How to avoid diacritic/accents sensitive issues

I'm creating a tiny program of guessing the capitals of countries. Some of the capitals have accents, cedillas, etc. Since I have to compare the capital and the text the user guessed, and I don't want an accent to mess up the comparison, I went…
Cláudio Pinto
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